SOLUTION: A chemist needs to mix an 18% acid solution with a 45% acid solution to obtain a 12 liters mixture consisting of 36% acid. How many liters of 45% acid solution must be used?

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Question 852915: A chemist needs to mix an 18% acid solution with a 45% acid solution to obtain a 12 liters mixture consisting of 36% acid. How many liters of 45% acid solution must be used?


Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
If the concentrations are as volume per volume or as mass/volume then this system works:

u = amount of 18% acid
v = amount of 45% acid

%2818u%2B45v%29%2F12=36 and u%2Bv=12
See this linked lesson for more about this type.